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                Gty的文艺妹子序列                </h1>
                <p>时间限制：50s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：256MB</p>			</div>
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                                <h3>题目描述</h3><p><div>Autumn终于会求区间逆序对了!Bakser神犇决定再考验一下他，他说道：</div>
<div></div>
<div>&ldquo;在Gty的妹子序列里，某个妹子的美丽度可也是会变化的呢。你还能求出某个区间</div>
<div></div>
<div>中妹子们美丽度的逆序对数吗？当然，为了方便，这次我们规定妹子们的美丽度在</div>
<div></div>
<div>[1,n]中。仍然强制在线。&rdquo;</div>
<div></div>
<div>Autumn需要你的帮助。</div>
<div></div>
<div>给定一个正整数序列a(1&lt;=ai&lt;=n)，支持单点修改，对于每次询问，输出al...ar中</div>
<div></div>
<div>的逆序对数，强制在线。</div>
<p></p></p><hr/><h3>输入格式</h3><p><div>第一行包括一个整数n(1&lt;=n&lt;=50000),表示数列a中的元素数。</div>
<div></div>
<div>第二行包括n个整数a1...an(1&lt;=ai&lt;=n)。</div>
<div></div>
<div>接下来一行包括一个整数m(1&lt;=m&lt;=50000),表示操作的个数。</div>
<div></div>
<div>接下来m行,每行包括3个整数。</div>
<div></div>
<div>0 L R (1&lt;=L&lt;=R&lt;=n) 询问[L,R]中的逆序对数。</div>
<div></div>
<div>1 p v (1&lt;=p&lt;=n,1&lt;=v&lt;=n) 将p位置的数修改为v。</div>
<div></div>
<div>L,R,p,v 都需要异或上一次的答案，保证异或之后的值是合法的。</div>
<div></div>
<div>保证涉及的所有数在int内。</div>
<p></p></p><hr/><h3>输出格式</h3><p><p>对每个询问，单独输出一行，表示al...ar中的逆序对数。对每个询问，单独输出一行，表示al...ar中的逆序对数。</p>
<p></p></p><hr/><h3>样例输入</h3><pre>10
1 7 5 6 9 4 9 4 4 7
10
0 4 6
0 5 8
0 1 10
1 25 19
0 19 25
1 14 4
0 12 12
0 2 5
1 8 7
1 1 10
</pre><hr/><h3>样例输出</h3><pre>2
3
16
13
0
2
</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>By Autumn</p>
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